#define PerlIO_clearerr(f) clearerr(f)
#define PerlIO_flush(f) Fflush(f)
#define PerlIO_tell(f) ftell(f)
-#define PerlIO_seek(f,o,w) fseek(f,o,w)
+#if defined(VMS) && !defined(__DECC)
+ /* Old VAXC RTL doesn't reset EOF on seek; Perl folk seem to expect this */
+# define PerlIO_seek(f,o,w) (((f) && (*f) && ((*f)->_flag &= ~_IOEOF)),fseek(f,o,w))
+#else
+# define PerlIO_seek(f,o,w) fseek(f,o,w)
+#endif
#ifdef HAS_FGETPOS
#define PerlIO_getpos(f,p) fgetpos(f,p)
#endif
#undef fopen
#undef vfprintf
#undef fgetc
+#undef getc_unlocked
#undef fputc
+#undef putc_unlocked
#undef fputs
#undef ungetc
#undef fread